| Whenever the scope of a plugin tag is entered, the PluginRules class
creates a new Rules instance and configures it with the appropriate
parsing rules for the plugged-in class.
Users of the plugins module can specify a subclass of this one to
control the creation of that Rules object. In particular, it can
set up default rules within the returned instance which are applicable
to all plugged-in classes.
since: 1.6 |